I just installed version 7.3.0 and found problems with using the dictionaryThe pt-BR.aff and pt-BR.dic files are located at: "C:\Program Files\Zimbra\Zimbra Desktop\win64\prism\xulrunner\dictionaries"Even so, the dictionary was not working.Then I located the Preferences file I opened it with notepad ++ and did the search for "en-US" without quotation marks and replaced en-US with pt-BRFile Location: %USERPROFILE%\AppData\Local\zimbra-desktop\User Data\Default\